Great stuff! Code churn is an early indicator of defect density ( http://portal.acm.org/citation.cfm?id=1062514 http://portal.acm.org/citation.cfm?id=1062514 )

Great stuff! Code churn is an early indicator of defect density ( http://portal.acm.org/citation.cfm?id=1062514 http://portal.acm.org/citation.cfm?id=1062514 ) and rarely gets the attention it deserves. Good use of hashalbum too. Have you thought about doing coupling as well?